1272148976 has 30 divisors (see below), whose sum is σ = 2867204880. Its totient is φ = 545206368.

The previous prime is 1272148949. The next prime is 1272148979. The reversal of 1272148976 is 6798412721.

It is a self number, because there is not a number n which added to its sum of digits gives 1272148976.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272148979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 810536 + ... + 812103.

It is an arithmetic number, because the mean of its divisors is an integer number (95573496).

Almost surely, 2^1272148976 is an apocalyptic number.

1272148976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1272148976 is an abundant number, since it is smaller than the sum of its proper divisors (1595055904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1272148976 is a wasteful number, since it uses less digits than its factorization.

1272148976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622661 (or 1622648 counting only the distinct ones).

The product of its digits is 338688, while the sum is 47.

The square root of 1272148976 is about 35667.1974789161. The cubic root of 1272148976 is about 1083.5426010143.

The spelling of 1272148976 in words is "one billion, two hundred seventy-two million, one hundred forty-eight thousand, nine hundred seventy-six".